John 6:71
He was referring to Judas, Simon Iscariot's son, for he was going to betray Him, although he was one of the Twelve.
Matthew 26:14-16
Then one of the Twelve, whose name was Judas Iscariot, went to the high priests,
Matthew 27:3-5
Then Judas, who had betrayed Him, as he felt condemned, in remorse brought back the thirty pieces to the high priests and elders,
John 13:26
Jesus answered, "It is that one to whom I give the piece of bread when I dip it in the dish." So He dipped it into the dish and took it and gave it to Judas, Simon Iscariot's son.
John 18:2-6
Now Judas, too, who betrayed Him, knew the spot, because Jesus had often met with His disciples there.
Acts 1:16-20
"Brothers, that Scripture had to be fulfilled which the Holy Spirit uttered by the mouth of David in the former times about Judas who became the guide to those who arrested Jesus;
Acts 2:23
this very Jesus, I say, after He was betrayed, in accordance with the predetermined plan and foreknowledge of God, you had wicked men kill by nailing Him to a cross;
Jude 1:4
For certain persons have sneaked in -- their doom was written down long ago -- godless persons, who turn the favor of our God into an excuse for licentiousness, and disown our only Master and Lord, Jesus Christ.